Title:
MULTICORE OPTICAL FIBER
Document Type and Number:
Japanese Patent JP2014197094
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a multicore optical fiber, even when a plurality of cores are symmetrically arranged in the cross section, capable of easily identifying the respective cores and inhibiting enlargement of a fiber outer diameter and deterioration in crosstalk between the cores.SOLUTION: A multicore optical fiber 1A includes cores 10 to 16, a visual recognition marker 20, and a shared cladding 30 enclosing the cores 10 to 16 and the visible recognition marker 20. The cores 10 to 16 and the visual recognition marker 20 extend along the fiber-axis direction. A refractive index of the visual recognition marker 20 differs from a refractive index of the cladding 30. In a cross-section perpendicular to the fiber-axis, the cores 10 to 16 are arranged such that they have six-rotational symmetry and a line symmetry. The visual recognition marker 20 is arranged at a position which breaks such the symmetries. The visual recognition marker 20 is arranged inside a circle having the minimum diameter for including the cores 10 to 16, with the fiber center as the circle center.
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Inventors:
NAGASHIMA TAKUSHI
NAKANISHI TETSUYA
NAKANISHI TETSUYA
Application Number:
JP2013072246A
Publication Date:
October 16, 2014
Filing Date:
March 29, 2013
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
G02B6/04
Domestic Patent References:
| JP2012168453A | 2012-09-06 | |||
| JP2012203036A | 2012-10-22 | |||
| JP2013050695A | 2013-03-14 |
Foreign References:
| WO2011102191A1 | 2011-08-25 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Ichiro Kondo
Yoshiaki Shibata
Yoshiki Kuroki
Ichiro Kondo
Yoshiaki Shibata
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